What was found
INVESTIGATING HIGH OIL TEMPERATURE IT WAS DISCOVERED THAT APPROXIMATELY 4 INCHES OF THE INSIDE LAYER OF THE OIL SUPPLY HOSE TO THE OIL COOLER AT THE ENG END BEGINNING APPROX 2 INCHES FROM THE BEGINNING OF THE HOSE HAD COMPLETELY COLLAPSED INWARD BLOCKING ALMOST ALL OIL FLOW TO THE OIL COOLER. THE HOSE HAD BEEN INSTALLED NEW 3/15/2012. ACFT HAS A POWER FLOW EXHAUST INSTALLED UNDER STC. THE OIL HOSES HAD BEEN ROUTED IAW THE STC AND WERE AT LEAST 2 INCHES FROM ANY POINT OF THE EXHAUST IAW THE STC. NEW FIRE SLEEVE HAD BEEN INSTALLED TO THIS HOSE 7/26/2017 DURING THE ANNUAL INSPECTION DUE TO THE FIRE SLEEVE HAVING A LARGE SPLIT APPROX 6 INCHES LONG IN THE END NEAREST THE OIL COOLER. ACCORDING TO THE OWNER HIGH OIL TEMPERATURES BEGAN TO OCCUR ABOUT A MONTH AND A COUPLE OF DOZEN HOURS AFTER THE NEW FIRE SLEEVE WAS INSTALLED.